Add crude DB backups

.gitignore

@@ -1,2 +1,3 @@
 ansible-navigator.log
 collections/
+backups/

roles/mastodon/tasks/main.yml

@@ -71,6 +71,47 @@
 - name: Install database quadlet
   ansible.builtin.include_tasks: db.yml
 
+- name: Schedule postgres database backup
+  ansible.builtin.cron:
+    name: "Backup mastodon postgres database"
+    minute: "0"
+    hour: "3"
+    job: >-
+      podman exec database pg_dump -U {{ mastodon_database.username }} mastodon
+      | gzip > ~/backups/mastodon-$(date +\%Y\%m\%d\%H\%M\%S).sql.gz &&
+      find ~/backups/ -type f -mtime 7 -delete
+
+- name: Find backup files
+  ansible.builtin.find:
+    paths: "~/backups"
+    patterns: "mastodon-*.sql.gz"
+  register: mastodon_backup_files
+  tags:
+    - backup
+
+- name: Identify latest backup file
+  ansible.builtin.set_fact:
+    mastodon_latest_backup: "{{ (mastodon_backup_files.files | sort(attribute='mtime') | last).path }}"
+  tags:
+    - backup
+
+- name: Ensure local backup directory exists
+  ansible.builtin.file:
+    path: "{{ mastodon_local_backup_dir }}"
+    state: directory
+  delegate_to: localhost
+  become: false
+  tags:
+    - backup
+
+- name: Download latest backup file to local machine
+  ansible.builtin.fetch:
+    src: "{{ mastodon_latest_backup }}"
+    dest: "{{ mastodon_local_backup_dir }}/{{ mastodon_latest_backup | basename }}"
+    flat: true
+  tags:
+    - backup
+
 - name: Install redis quadlet
   ansible.builtin.include_tasks: redis.yml
 

roles/mastodon/vars/main.yml

@@ -7,3 +7,6 @@ mastodon_local_dirs:
   - "~/mastodon/redis"
   - "~/mastodon/elasticsearch"
   - "~/mastodon/system"
+  - "~/backups"
+
+mastodon_local_backup_dir: "{{ playbook_dir }}/backups"